998100805 has 8 divisors (see below), whose sum is σ = 1289853432. Its totient is φ = 737059008.

The previous prime is 998100791. The next prime is 998100827. The reversal of 998100805 is 508001899.

It can be written as a sum of positive squares in 4 ways, for example, as 22600516 + 975500289 = 4754^2 + 31233^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 998100805 - 2¹⁵ = 998068037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7677634 + ... + 7677763.

It is an arithmetic number, because the mean of its divisors is an integer number (161231679).

Almost surely, 2^998100805 is an apocalyptic number.

It is an amenable number.

998100805 is a deficient number, since it is larger than the sum of its proper divisors (291752627).

998100805 is a wasteful number, since it uses less digits than its factorization.

998100805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15355415.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 998100805 is about 31592.7334208359. The cubic root of 998100805 is about 999.3665338053.

The spelling of 998100805 in words is "nine hundred ninety-eight million, one hundred thousand, eight hundred five".